Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2020

Defined Benefit Pension Plans

Defined Benefit Plan Disclosure

Components of Net Periodic Expense

Components of net periodic expense (benefit) are as follows:

Defined Benefit Pension Plans

	U.S.				Foreign
	Three months ended March 31,				Three months ended March 31,
	2020		2019		2020		2019
Service cost	$	192	$	219	$	997	$	806
Interest cost	2,152		2,507		707		833
Expected return on plan assets	(3,331)		(2,757)		(810)		(603)
Amortization of net loss	—		—		41		—
Amortization of prior service cost	—		—		6		—
Net periodic expense (benefit)	$	(987)	$	(31)	$	941	$	1,036

Supplemental Retirement Plans

Defined Benefit Plan Disclosure

Components of Net Periodic Expense

Supplemental Retirement Plans

	Three months ended March 31,
	2020		2019
Interest cost	$	86	$	121
Net periodic expense	$	86	$	121

Other Postretirement Benefits Plans

Defined Benefit Plan Disclosure

Components of Net Periodic Expense

Other Postretirement Benefit Plans

	Three months ended March 31,
	2020		2019
Service cost	$	—	$	3
Interest cost	24		38
Amortization of prior service credit	(58)		(33)
Amortization of net gain	(7)		(8)
Net periodic expense (benefit)	$	(41)	$	—